Composite window frame structural member

Abstract

The composite window frame structural member provides an elongated structural member comprising a polymer and wood fiber composition suitable for use and the manufacture of a window frame to be embedded in a concrete wall to define an opening therein and includes a top surface defining one side of the opening and a bottom surface that has at least two longitudinally extending concrete engaging members formed with an outer end and an inner end arcuately undercut to permit an even flow of concrete about the tendons as the concrete wall is poured.

What is claimed is:  
     
       1. An elongated structural member comprising a polymer and wood fibre composition suitable for use in the manufacture of a window frame to be embedded in a concrete wall to define an opening therein, said member further comprising: 
       (a) a top surface defining one side of said opening; and  
       (b) a bottom surface for embedding in said concrete and having at least two longitudinally extending concrete engaging tenons located on opposite sides of said bottom surface and formed with an outer end and an inner end that is arcuately undercut in a side of each tenon to permit an even flow of concrete about said tenons as said concrete is poured.  
     
     
       2. A structural member as recited in  claim 1 , wherein said bottom surface further includes at least one medially located tenon formed with an outer end and an inner end that is arcuately undercut to permit an even flow of concrete about said media tenon as said concrete wall is formed. 
     
     
       3. A structural member as recited in  claim 1 , wherein said bottom surface includes at least two medially located tenons. 
     
     
       4. A structural member as recited in  claim 3 , wherein each of said medial tenons include an arcuately shaped boss formed on the outer end and extending transversely of said bottom surface. 
     
     
       5. A structural member as recited in  claim 4 , wherein said bosses on said medial tenons extend in opposite directions. 
     
     
       6. A structural member as recited in  claim 1 , wherein said side tenons have arcuately shaped bosses formed on their outer ends. 
     
     
       7. A structural member as recited in  claim 6 , wherein said bosses on said side tenons extend transversely to the bottom surface in directions opposite to one another. 
     
     
       8. A structural member as recited in  claim 7 , wherein said bottom surface further includes a pair of medially located tenons, each formed with an outer end and an inner end that is arcuately undercut to permit an even flow of concrete about said medial tenons as said concrete wall is formed. 
     
     
       9. A structural member as recited in  claim 8 , wherein said outer ends of said medial tenons are formed with bosses extending transversely to said bottom surface. 
     
     
       10. A structural member as recited in  claim 9 , wherein one of said side tenons is associated with one of said medial tenons whereby each of said tenons has a boss that extends toward the boss on said other tenon to form a concrete engaging tenon combination to secure said structural member in said concrete wall.